Ericsson, Nokia and Siemens Team on Push-to-Talk Solution

Ericsson, Nokia and Siemens agreed to jointly develop an open standard to speed the adoption of direct-call push to talk service over GPRS. Push-to-talk enables walkie talkie like services over cellular networks by pushing a button on a mobile handset. Users receiving the transmission hear the sender's voice automatically without having to answer the call. The Ericsson/Nokia/Siemens technology uses the capabilities of the IP Multimedia Subsystem (IMS) as specified by 3GPP for enabling IP connections between mobile phones. Initial trials are expected to begin in the second half of 2003. AT&T Wireless and Cingular Wireless support this initiative.
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